Hi
You click on Content and then Files, there is a box where you can create a folder:
You put the folder name in the box and then click 'create folder'. If you want to create a folder wihtin a folder you use the same box but you need to click into the folder you want to create the folding in first. You can drag folders into other folders by clicking the icon and dragging it over the folder.
Kind Regards
RichardÂ